cv.imread使用问题

img = cv.imread("dill.png",0)
cv.imshow('img',img)
cv.waitKey(0)
cv.destroyAllWindows()

"C:\Program Files\Python38\python.exe" D:\python-learn\main.py
Traceback (most recent call last):
File "D:\python-learn\main.py", line 5, in
img = cv.imread("dill.png",0)
TypeError: imread() takes 0 positional arguments but 2 were given

#去掉cv. imread()中第二个参数0
img = cv.imread("dill.png")
cv.imshow('img',img)
cv.waitKey(0)
cv.destroyAllWindows()

代码没问题，是可以读取的，你看下你是不是重定义了cv或者imread？把完整的代码贴出来看下